5/8"-18 Nuts | McMaster-Carr

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System of Measurement

Thread Size

4-40 to 5/16"-32

Material

Silicone Rubber

Stainless Steel

Nut Type

Externally Threaded

Tamper Resistant

Fastener Strength Grade/Class

Hex Nut Profile

Finish

Aluminum Plated

Cadmium Yellow-Chromate Plated

Dry Film Lubricated

Phosphate Coated

Zinc Flake Coated

Zinc Yellow-Chromate Plated

Thread Direction

Height

Width

Thread Spacing

Thread Type

Metric Rounded Trapezoidal

UN/UNF (SAE 45°)

Fastener Strength Rating

Locking Type

Distorted Thread

Two-Piece Clamp

Specifications Met

Fed. Spec. FF-N-836

Performance

Corrosion Resistant

Vibration Resistant

Thread Pitch

Length

Drive Style

External 12-Point

RoHS

Compliant with Exemptions

Thread Fit

Metric Class 6H

Unified Standard Class 2B

Unified Standard Class 3B

Export Control Classification Number (ECCN)

Flange Diameter

DFARS Specialty Metals

REACH

Threading

Partially Threaded

How can we improve?

230 Products

Fastening and Joining

Hex Nuts

Handle most general fastening needs

Locknuts

Hold fasteners in place to prevent loosening from vibration

Flange Nuts

The flange distributes pressure, so you don't need a washer

Coupling Nuts

Connect and extend threaded rods

Cap Nuts

Cover and protect threads while adding a finished look; also known as acorn nuts

Socket Nuts

Install in recessed holes and tight spots where a wrench won’t fit; also known as Allen nuts

Sealing Nuts

Prevent leaks and block out contaminants with a rubber seal

Easy to tighten and loosen by hand for making frequent adjustments

Tamper-Resistant Nuts

Tamper-Resistant Nuts

Hard to detach without special tools to prevent unwanted removal

Thread Adapters

Thread Adapters

Join threads of a different type, size, and gender

Weld Nuts

Weld to metal surfaces to add permanent threads

Threaded Inserts

Threaded Inserts

Create new threads or repair stripped threads

Fluid Handling

Tube Fitting Nuts

Tube Fitting Nuts

Tighten to create a strong seal between tube and tube fittings

Hose and Hose Fittings

Hose and Hose Fittings

Flexible and stronger than tubing; often used to convey liquids and gases under pressure

Building and Machinery Hardware

Handle Nuts

Attach to threaded shafts to quickly turn the shafts by hand

Power Transmission

Lead Screws and Nuts

Lead Screws and Nuts

Components travel along a screw with broad, square threads to clamp and lift heavy loads

Material Handling

Turnbuckle Bodies

Turnbuckle Bodies

Pair with end fittings to create a custom turnbuckle

The quick brown fox jumped over the lazy dog. Pedestal (35" Ht. x 4" Wd. x 4" Dp.)